298920 ÷ 90 
The aim is to understand the frequency of 90 in 298920.

On to step 1:
If we divide 2 by 90, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Bring next digit (9) of the dividend behind the 2 and repeat the process: 29 / 90

Advancing to step 2:
29 divided by 90 is 0 with a remainder of 29.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 29, we get 29.
Append the next digit (8) from the dividend to 29 and continue with: 298 / 90

Going ahead to step 3:
90 can be fit into 298 3 times, resulting in a remainder of 28.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 270 from 298 and we're left with 28.
Fetch the next digit (9) from the dividend, attach it to 28 and continue: 289 / 90

Going ahead to step 4:
90 goes into 289 3 times with a remainder of 19.
The number 3 becomes the next digit in our result. 
Result so far: 33.0
If we subtract 270 from 289, we get 19.
Fetch the next digit (2) from the dividend, attach it to 19 and continue: 192 / 90

Going ahead to step 5:
The number 90 fits into 192 2 times, leaving a remainder of 12.
The number 2 becomes the next digit in our result. 
Result so far: 332.0
If we take 180 away from 192, we end up with 12.
Append the next digit (0) from the dividend to 12 and continue with: 120 / 90

Moving on to step 6:
When dividing 120 by 90, we get 1 with a remainder of 30.
Put 1 as the next digit of the answer. 
Result so far: 3321.0
If we subtract 90 from 120, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 7:
The number 90 fits into 300 3 times, leaving a remainder of 30.
The number 3 becomes the next digit in our result. 
Result so far: 3321.3
Subtracting 270 from 300 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 8:
If we divide 300 by 90, we get 3 and a remainder of 30.
The next digit of our result is 3. 
Result so far: 3321.33
The remainder is 30 after subtracting 270 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final result is 3321.33 with a remainder of 0.03.